[Bug 43776] New: .NET 4.0 installer spams with error message boxes

https://bugs.winehq.org/show_bug.cgi?id=43776

Bug ID: 43776
           Summary: .NET 4.0 installer spams with error message boxes
           Product: Wine
           Version: 2.17
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Easy way to test this is 'winetricks -q dotnet45', when dotnet40 step is
executed installer shows .config file parsing failure message in a form of
message box. This happens about 10 times, and installer finishes successfully
after.